PCI_CHECK_AND_MASK_I(9) Hardware Interfaces PCI_CHECK_AND_MASK_I(9)NAME
pci_check_and_mask_intx - mask INTx on pending interrupt
SYNOPSIS
bool pci_check_and_mask_intx(struct pci_dev * dev);
ARGUMENTS
dev
the PCI device to operate on
DESCRIPTION
Check if the device dev has its INTx line asserted, mask it and return true in that case. False is returned if not interrupt was pending.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 PCI_CHECK_AND_MASK_I(9)
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CCW_DEVICE_START_KEY(9) The ccw bus CCW_DEVICE_START_KEY(9)NAME
ccw_device_start_key - start a s390 channel program with key
SYNOPSIS
int ccw_device_start_key(struct ccw_device * cdev, struct ccw1 * cpa, unsigned long intparm, __u8 lpm, __u8 key, unsigned long flags);
ARGUMENTS
cdev
target ccw device
cpa
logical start address of channel program
intparm
user specific interruption parameter; will be presented back to cdev's interrupt handler. Allows a device driver to associate the
interrupt with a particular I/O request.
lpm
defines the channel path to be used for a specific I/O request. A value of 0 will make cio use the opm.
key
storage key to be used for the I/O
flags
additional flags; defines the action to be performed for I/O processing.
DESCRIPTION
Start a S/390 channel program. When the interrupt arrives, the IRQ handler is called, either immediately, delayed (dev-end missing, or
sense required) or never (no IRQ handler registered).
RETURNS
0, if the operation was successful; -EBUSY, if the device is busy, or status pending; -EACCES, if no path specified in lpm is operational;
-ENODEV, if the device is not operational.
CONTEXT
Interrupts disabled, ccw device lock held
AUTHOR
Cornelia Huck <cornelia.huck@de.ibm.com>
Author.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 CCW_DEVICE_START_KEY(9)
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